Study of 3.5 Million People Finds Human Hormones Change With The Seasons#stress Today is the last day of summer. Do our stress levels change with the seasons? How about our moods? Do you feel like you are affected by seasonal changes? “Meanwhile, research on salivary cortisol levels – aka the stress hormone – finds there is some seasonal variability, and a big data study on the thyroid-stimulating hormone found higher levels of this hormone in summer and winter.” Nothing is conclusive but there are compelling studies that point to humans having an internal rhythm in line with the seasons that affect our hormone production.
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